<?php
    /**
     * PHPExcel
     * Copyright (c) 2006 - 2015 PHPExcel
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2.1 of the License, or (at your option) any later version.
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
     * @category   PHPExcel
     * @package    PHPExcel_Writer_Excel2007
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
     * @version    ##VERSION##, ##DATE##
     */

    /**
     * PHPExcel_Writer_Excel2007_Worksheet
     * @category   PHPExcel
     * @package    PHPExcel_Writer_Excel2007
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     */
    class PHPExcel_Writer_Excel2007_Worksheet extends PHPExcel_Writer_Excel2007_WriterPart {
        /**
         * Write worksheet to XML format
         * @param    PHPExcel_Worksheet $pSheet
         * @param    string[]           $pStringTable
         * @param    boolean            $includeCharts Flag indicating if we should write charts
         * @return    string                    XML Output
         * @throws    PHPExcel_Writer_Exception
         */
        public function writeWorksheet($pSheet = null, $pStringTable = null, $includeCharts = false) {
            if (!is_null($pSheet)) {
                // Create XML writer
                $objWriter = null;
                if ($this->getParentWriter()->getUseDiskCaching()) {
                    $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
                } else {
                    $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
                }
                // XML header
                $objWriter->startDocument('1.0', 'UTF-8', 'yes');
                // Worksheet
                $objWriter->startElement('worksheet');
                $objWriter->writeAttribute('xml:space', 'preserve');
                $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');
                $objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');
                // sheetPr
                $this->writeSheetPr($objWriter, $pSheet);
                // Dimension
                $this->writeDimension($objWriter, $pSheet);
                // sheetViews
                $this->writeSheetViews($objWriter, $pSheet);
                // sheetFormatPr
                $this->writeSheetFormatPr($objWriter, $pSheet);
                // cols
                $this->writeCols($objWriter, $pSheet);
                // sheetData
                $this->writeSheetData($objWriter, $pSheet, $pStringTable);
                // sheetProtection
                $this->writeSheetProtection($objWriter, $pSheet);
                // protectedRanges
                $this->writeProtectedRanges($objWriter, $pSheet);
                // autoFilter
                $this->writeAutoFilter($objWriter, $pSheet);
                // mergeCells
                $this->writeMergeCells($objWriter, $pSheet);
                // conditionalFormatting
                $this->writeConditionalFormatting($objWriter, $pSheet);
                // dataValidations
                $this->writeDataValidations($objWriter, $pSheet);
                // hyperlinks
                $this->writeHyperlinks($objWriter, $pSheet);
                // Print options
                $this->writePrintOptions($objWriter, $pSheet);
                // Page margins
                $this->writePageMargins($objWriter, $pSheet);
                // Page setup
                $this->writePageSetup($objWriter, $pSheet);
                // Header / footer
                $this->writeHeaderFooter($objWriter, $pSheet);
                // Breaks
                $this->writeBreaks($objWriter, $pSheet);
                // Drawings and/or Charts
                $this->writeDrawings($objWriter, $pSheet, $includeCharts);
                // LegacyDrawing
                $this->writeLegacyDrawing($objWriter, $pSheet);
                // LegacyDrawingHF
                $this->writeLegacyDrawingHF($objWriter, $pSheet);
                $objWriter->endElement();
                // Return
                return $objWriter->getData();
            } else {
                throw new PHPExcel_Writer_Exception("Invalid PHPExcel_Worksheet object passed.");
            }
        }

        /**
         * Write SheetPr
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeSheetPr(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // sheetPr
            $objWriter->startElement('sheetPr');
            //$objWriter->writeAttribute('codeName',        $pSheet->getTitle());
            if ($pSheet->getParent()->hasMacros()) {//if the workbook have macros, we need to have codeName for the sheet
                if ($pSheet->hasCodeName() == false) {
                    $pSheet->setCodeName($pSheet->getTitle());
                }
                $objWriter->writeAttribute('codeName', $pSheet->getCodeName());
            }
            $autoFilterRange = $pSheet->getAutoFilter()->getRange();
            if (!empty($autoFilterRange)) {
                $objWriter->writeAttribute('filterMode', 1);
                $pSheet->getAutoFilter()->showHideRows();
            }
            // tabColor
            if ($pSheet->isTabColorSet()) {
                $objWriter->startElement('tabColor');
                $objWriter->writeAttribute('rgb', $pSheet->getTabColor()->getARGB());
                $objWriter->endElement();
            }
            // outlinePr
            $objWriter->startElement('outlinePr');
            $objWriter->writeAttribute('summaryBelow', ($pSheet->getShowSummaryBelow() ? '1' : '0'));
            $objWriter->writeAttribute('summaryRight', ($pSheet->getShowSummaryRight() ? '1' : '0'));
            $objWriter->endElement();
            // pageSetUpPr
            if ($pSheet->getPageSetup()->getFitToPage()) {
                $objWriter->startElement('pageSetUpPr');
                $objWriter->writeAttribute('fitToPage', '1');
                $objWriter->endElement();
            }
            $objWriter->endElement();
        }

        /**
         * Write Dimension
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeDimension(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // dimension
            $objWriter->startElement('dimension');
            $objWriter->writeAttribute('ref', $pSheet->calculateWorksheetDimension());
            $objWriter->endElement();
        }

        /**
         * Write SheetViews
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeSheetViews(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // sheetViews
            $objWriter->startElement('sheetViews');
            // Sheet selected?
            $sheetSelected = false;
            if ($this->getParentWriter()->getPHPExcel()->getIndex($pSheet) == $this->getParentWriter()->getPHPExcel()->getActiveSheetIndex()) {
                $sheetSelected = true;
            }
            // sheetView
            $objWriter->startElement('sheetView');
            $objWriter->writeAttribute('tabSelected', $sheetSelected ? '1' : '0');
            $objWriter->writeAttribute('workbookViewId', '0');
            // Zoom scales
            if ($pSheet->getSheetView()->getZoomScale() != 100) {
                $objWriter->writeAttribute('zoomScale', $pSheet->getSheetView()->getZoomScale());
            }
            if ($pSheet->getSheetView()->getZoomScaleNormal() != 100) {
                $objWriter->writeAttribute('zoomScaleNormal', $pSheet->getSheetView()->getZoomScaleNormal());
            }
            // View Layout Type
            if ($pSheet->getSheetView()->getView() !== PHPExcel_Worksheet_SheetView::SHEETVIEW_NORMAL) {
                $objWriter->writeAttribute('view', $pSheet->getSheetView()->getView());
            }
            // Gridlines
            if ($pSheet->getShowGridlines()) {
                $objWriter->writeAttribute('showGridLines', 'true');
            } else {
                $objWriter->writeAttribute('showGridLines', 'false');
            }
            // Row and column headers
            if ($pSheet->getShowRowColHeaders()) {
                $objWriter->writeAttribute('showRowColHeaders', '1');
            } else {
                $objWriter->writeAttribute('showRowColHeaders', '0');
            }
            // Right-to-left
            if ($pSheet->getRightToLeft()) {
                $objWriter->writeAttribute('rightToLeft', 'true');
            }
            $activeCell = $pSheet->getActiveCell();
            // Pane
            $pane        = '';
            $topLeftCell = $pSheet->getFreezePane();
            if (($topLeftCell != '') && ($topLeftCell != 'A1')) {
                $activeCell = empty($activeCell) ? $topLeftCell : $activeCell;
                // Calculate freeze coordinates
                $xSplit = $ySplit = 0;
                list($xSplit, $ySplit) = PHPExcel_Cell::coordinateFromString($topLeftCell);
                $xSplit = PHPExcel_Cell::columnIndexFromString($xSplit);
                // pane
                $pane = 'topRight';
                $objWriter->startElement('pane');
                if ($xSplit > 1) {
                    $objWriter->writeAttribute('xSplit', $xSplit - 1);
                }
                if ($ySplit > 1) {
                    $objWriter->writeAttribute('ySplit', $ySplit - 1);
                    $pane = ($xSplit > 1) ? 'bottomRight' : 'bottomLeft';
                }
                $objWriter->writeAttribute('topLeftCell', $topLeftCell);
                $objWriter->writeAttribute('activePane', $pane);
                $objWriter->writeAttribute('state', 'frozen');
                $objWriter->endElement();
                if (($xSplit > 1) && ($ySplit > 1)) {
                    //    Write additional selections if more than two panes (ie both an X and a Y split)
                    $objWriter->startElement('selection');
                    $objWriter->writeAttribute('pane', 'topRight');
                    $objWriter->endElement();
                    $objWriter->startElement('selection');
                    $objWriter->writeAttribute('pane', 'bottomLeft');
                    $objWriter->endElement();
                }
            }
            // Selection
            //      if ($pane != '') {
            // Only need to write selection element if we have a split pane
            // We cheat a little by over-riding the active cell selection, setting it to the split cell
            $objWriter->startElement('selection');
            if ($pane != '') {
                $objWriter->writeAttribute('pane', $pane);
            }
            $objWriter->writeAttribute('activeCell', $activeCell);
            $objWriter->writeAttribute('sqref', $activeCell);
            $objWriter->endElement();
            //      }
            $objWriter->endElement();
            $objWriter->endElement();
        }

        /**
         * Write SheetFormatPr
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeSheetFormatPr(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // sheetFormatPr
            $objWriter->startElement('sheetFormatPr');
            // Default row height
            if ($pSheet->getDefaultRowDimension()->getRowHeight() >= 0) {
                $objWriter->writeAttribute('customHeight', 'true');
                $objWriter->writeAttribute('defaultRowHeight', PHPExcel_Shared_String::FormatNumber($pSheet->getDefaultRowDimension()->getRowHeight()));
            } else {
                $objWriter->writeAttribute('defaultRowHeight', '14.4');
            }
            // Set Zero Height row
            if ((string)$pSheet->getDefaultRowDimension()->getZeroHeight() == '1' || strtolower((string)$pSheet->getDefaultRowDimension()->getZeroHeight()) == 'true') {
                $objWriter->writeAttribute('zeroHeight', '1');
            }
            // Default column width
            if ($pSheet->getDefaultColumnDimension()->getWidth() >= 0) {
                $objWriter->writeAttribute('defaultColWidth', PHPExcel_Shared_String::FormatNumber($pSheet->getDefaultColumnDimension()->getWidth()));
            }
            // Outline level - row
            $outlineLevelRow = 0;
            foreach ($pSheet->getRowDimensions() as $dimension) {
                if ($dimension->getOutlineLevel() > $outlineLevelRow) {
                    $outlineLevelRow = $dimension->getOutlineLevel();
                }
            }
            $objWriter->writeAttribute('outlineLevelRow', (int)$outlineLevelRow);
            // Outline level - column
            $outlineLevelCol = 0;
            foreach ($pSheet->getColumnDimensions() as $dimension) {
                if ($dimension->getOutlineLevel() > $outlineLevelCol) {
                    $outlineLevelCol = $dimension->getOutlineLevel();
                }
            }
            $objWriter->writeAttribute('outlineLevelCol', (int)$outlineLevelCol);
            $objWriter->endElement();
        }

        /**
         * Write Cols
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeCols(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // cols
            if (count($pSheet->getColumnDimensions()) > 0) {
                $objWriter->startElement('cols');
                $pSheet->calculateColumnWidths();
                // Loop through column dimensions
                foreach ($pSheet->getColumnDimensions() as $colDimension) {
                    // col
                    $objWriter->startElement('col');
                    $objWriter->writeAttribute('min', PHPExcel_Cell::columnIndexFromString($colDimension->getColumnIndex()));
                    $objWriter->writeAttribute('max', PHPExcel_Cell::columnIndexFromString($colDimension->getColumnIndex()));
                    if ($colDimension->getWidth() < 0) {
                        // No width set, apply default of 10
                        $objWriter->writeAttribute('width', '9.10');
                    } else {
                        // Width set
                        $objWriter->writeAttribute('width', PHPExcel_Shared_String::FormatNumber($colDimension->getWidth()));
                    }
                    // Column visibility
                    if ($colDimension->getVisible() == false) {
                        $objWriter->writeAttribute('hidden', 'true');
                    }
                    // Auto size?
                    if ($colDimension->getAutoSize()) {
                        $objWriter->writeAttribute('bestFit', 'true');
                    }
                    // Custom width?
                    if ($colDimension->getWidth() != $pSheet->getDefaultColumnDimension()->getWidth()) {
                        $objWriter->writeAttribute('customWidth', 'true');
                    }
                    // Collapsed
                    if ($colDimension->getCollapsed() == true) {
                        $objWriter->writeAttribute('collapsed', 'true');
                    }
                    // Outline level
                    if ($colDimension->getOutlineLevel() > 0) {
                        $objWriter->writeAttribute('outlineLevel', $colDimension->getOutlineLevel());
                    }
                    // Style
                    $objWriter->writeAttribute('style', $colDimension->getXfIndex());
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write SheetData
         * @param    PHPExcel_Shared_XMLWriter $objWriter    XML Writer
         * @param    PHPExcel_Worksheet        $pSheet       Worksheet
         * @param    string[]                  $pStringTable String table
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeSheetData(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null, $pStringTable = null) {
            if (is_array($pStringTable)) {
                // Flipped stringtable, for faster index searching
                $aFlippedStringTable = $this->getParentWriter()->getWriterPart('stringtable')->flipStringTable($pStringTable);
                // sheetData
                $objWriter->startElement('sheetData');
                // Get column count
                $colCount = PHPExcel_Cell::columnIndexFromString($pSheet->getHighestColumn());
                // Highest row number
                $highestRow = $pSheet->getHighestRow();
                // Loop through cells
                $cellsByRow = [];
                foreach ($pSheet->getCellCollection() as $cellID) {
                    $cellAddress                   = PHPExcel_Cell::coordinateFromString($cellID);
                    $cellsByRow[$cellAddress[1]][] = $cellID;
                }
                $currentRow = 0;
                while ($currentRow++ < $highestRow) {
                    // Get row dimension
                    $rowDimension = $pSheet->getRowDimension($currentRow);
                    // Write current row?
                    $writeCurrentRow = isset($cellsByRow[$currentRow]) || $rowDimension->getRowHeight() >= 0 || $rowDimension->getVisible() == false || $rowDimension->getCollapsed() == true || $rowDimension->getOutlineLevel() > 0 || $rowDimension->getXfIndex() !== null;
                    if ($writeCurrentRow) {
                        // Start a new row
                        $objWriter->startElement('row');
                        $objWriter->writeAttribute('r', $currentRow);
                        $objWriter->writeAttribute('spans', '1:' . $colCount);
                        // Row dimensions
                        if ($rowDimension->getRowHeight() >= 0) {
                            $objWriter->writeAttribute('customHeight', '1');
                            $objWriter->writeAttribute('ht', PHPExcel_Shared_String::FormatNumber($rowDimension->getRowHeight()));
                        }
                        // Row visibility
                        if ($rowDimension->getVisible() == false) {
                            $objWriter->writeAttribute('hidden', 'true');
                        }
                        // Collapsed
                        if ($rowDimension->getCollapsed() == true) {
                            $objWriter->writeAttribute('collapsed', 'true');
                        }
                        // Outline level
                        if ($rowDimension->getOutlineLevel() > 0) {
                            $objWriter->writeAttribute('outlineLevel', $rowDimension->getOutlineLevel());
                        }
                        // Style
                        if ($rowDimension->getXfIndex() !== null) {
                            $objWriter->writeAttribute('s', $rowDimension->getXfIndex());
                            $objWriter->writeAttribute('customFormat', '1');
                        }
                        // Write cells
                        if (isset($cellsByRow[$currentRow])) {
                            foreach ($cellsByRow[$currentRow] as $cellAddress) {
                                // Write cell
                                $this->writeCell($objWriter, $pSheet, $cellAddress, $pStringTable, $aFlippedStringTable);
                            }
                        }
                        // End row
                        $objWriter->endElement();
                    }
                }
                $objWriter->endElement();
            } else {
                throw new PHPExcel_Writer_Exception("Invalid parameters passed.");
            }
        }

        /**
         * Write Cell
         * @param    PHPExcel_Shared_XMLWriter $objWriter           XML Writer
         * @param    PHPExcel_Worksheet        $pSheet              Worksheet
         * @param    PHPExcel_Cell             $pCellAddress        Cell Address
         * @param    string[]                  $pStringTable        String table
         * @param    string[]                  $pFlippedStringTable String table (flipped), for faster index searching
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeCell(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null, $pCellAddress = null, $pStringTable = null, $pFlippedStringTable = null) {
            if (is_array($pStringTable) && is_array($pFlippedStringTable)) {
                // Cell
                $pCell = $pSheet->getCell($pCellAddress);
                $objWriter->startElement('c');
                $objWriter->writeAttribute('r', $pCellAddress);
                // Sheet styles
                if ($pCell->getXfIndex() != '') {
                    $objWriter->writeAttribute('s', $pCell->getXfIndex());
                }
                // If cell value is supplied, write cell value
                $cellValue = $pCell->getValue();
                if (is_object($cellValue) || $cellValue !== '') {
                    // Map type
                    $mappedType = $pCell->getDataType();
                    // Write data type depending on its type
                    switch (strtolower($mappedType)) {
                        case 'inlinestr':    // Inline string
                        case 's':            // String
                        case 'b':            // Boolean
                            $objWriter->writeAttribute('t', $mappedType);
                            break;
                        case 'f':            // Formula
                            $calculatedValue = ($this->getParentWriter()->getPreCalculateFormulas()) ? $pCell->getCalculatedValue() : $cellValue;
                            if (is_string($calculatedValue)) {
                                $objWriter->writeAttribute('t', 'str');
                            }
                            break;
                        case 'e':            // Error
                            $objWriter->writeAttribute('t', $mappedType);
                    }
                    // Write data depending on its type
                    switch (strtolower($mappedType)) {
                        case 'inlinestr':    // Inline string
                            if (!$cellValue instanceof PHPExcel_RichText) {
                                $objWriter->writeElement('t', PHPExcel_Shared_String::ControlCharacterPHP2OOXML(htmlspecialchars($cellValue)));
                            } elseif ($cellValue instanceof PHPExcel_RichText) {
                                $objWriter->startElement('is');
                                $this->getParentWriter()->getWriterPart('stringtable')->writeRichText($objWriter, $cellValue);
                                $objWriter->endElement();
                            }
                            break;
                        case 's':            // String
                            if (!$cellValue instanceof PHPExcel_RichText) {
                                if (isset($pFlippedStringTable[$cellValue])) {
                                    $objWriter->writeElement('v', $pFlippedStringTable[$cellValue]);
                                }
                            } elseif ($cellValue instanceof PHPExcel_RichText) {
                                $objWriter->writeElement('v', $pFlippedStringTable[$cellValue->getHashCode()]);
                            }
                            break;
                        case 'f':            // Formula
                            $attributes = $pCell->getFormulaAttributes();
                            if ($attributes['t'] == 'array') {
                                $objWriter->startElement('f');
                                $objWriter->writeAttribute('t', 'array');
                                $objWriter->writeAttribute('ref', $pCellAddress);
                                $objWriter->writeAttribute('aca', '1');
                                $objWriter->writeAttribute('ca', '1');
                                $objWriter->text(substr($cellValue, 1));
                                $objWriter->endElement();
                            } else {
                                $objWriter->writeElement('f', substr($cellValue, 1));
                            }
                            if ($this->getParentWriter()->getOffice2003Compatibility() === false) {
                                if ($this->getParentWriter()->getPreCalculateFormulas()) {
                                    //                                $calculatedValue = $pCell->getCalculatedValue();
                                    if (!is_array($calculatedValue) && substr($calculatedValue, 0, 1) != '#') {
                                        $objWriter->writeElement('v', PHPExcel_Shared_String::FormatNumber($calculatedValue));
                                    } else {
                                        $objWriter->writeElement('v', '0');
                                    }
                                } else {
                                    $objWriter->writeElement('v', '0');
                                }
                            }
                            break;
                        case 'n':            // Numeric
                            // force point as decimal separator in case current locale uses comma
                            $objWriter->writeElement('v', str_replace(',', '.', $cellValue));
                            break;
                        case 'b':            // Boolean
                            $objWriter->writeElement('v', ($cellValue ? '1' : '0'));
                            break;
                        case 'e':            // Error
                            if (substr($cellValue, 0, 1) == '=') {
                                $objWriter->writeElement('f', substr($cellValue, 1));
                                $objWriter->writeElement('v', substr($cellValue, 1));
                            } else {
                                $objWriter->writeElement('v', $cellValue);
                            }
                            break;
                    }
                }
                $objWriter->endElement();
            } else {
                throw new PHPExcel_Writer_Exception("Invalid parameters passed.");
            }
        }

        /**
         * Write SheetProtection
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeSheetProtection(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // sheetProtection
            $objWriter->startElement('sheetProtection');
            if ($pSheet->getProtection()->getPassword() != '') {
                $objWriter->writeAttribute('password', $pSheet->getProtection()->getPassword());
            }
            $objWriter->writeAttribute('sheet', ($pSheet->getProtection()->getSheet() ? 'true' : 'false'));
            $objWriter->writeAttribute('objects', ($pSheet->getProtection()->getObjects() ? 'true' : 'false'));
            $objWriter->writeAttribute('scenarios', ($pSheet->getProtection()->getScenarios() ? 'true' : 'false'));
            $objWriter->writeAttribute('formatCells', ($pSheet->getProtection()->getFormatCells() ? 'true' : 'false'));
            $objWriter->writeAttribute('formatColumns', ($pSheet->getProtection()->getFormatColumns() ? 'true' : 'false'));
            $objWriter->writeAttribute('formatRows', ($pSheet->getProtection()->getFormatRows() ? 'true' : 'false'));
            $objWriter->writeAttribute('insertColumns', ($pSheet->getProtection()->getInsertColumns() ? 'true' : 'false'));
            $objWriter->writeAttribute('insertRows', ($pSheet->getProtection()->getInsertRows() ? 'true' : 'false'));
            $objWriter->writeAttribute('insertHyperlinks', ($pSheet->getProtection()->getInsertHyperlinks() ? 'true' : 'false'));
            $objWriter->writeAttribute('deleteColumns', ($pSheet->getProtection()->getDeleteColumns() ? 'true' : 'false'));
            $objWriter->writeAttribute('deleteRows', ($pSheet->getProtection()->getDeleteRows() ? 'true' : 'false'));
            $objWriter->writeAttribute('selectLockedCells', ($pSheet->getProtection()->getSelectLockedCells() ? 'true' : 'false'));
            $objWriter->writeAttribute('sort', ($pSheet->getProtection()->getSort() ? 'true' : 'false'));
            $objWriter->writeAttribute('autoFilter', ($pSheet->getProtection()->getAutoFilter() ? 'true' : 'false'));
            $objWriter->writeAttribute('pivotTables', ($pSheet->getProtection()->getPivotTables() ? 'true' : 'false'));
            $objWriter->writeAttribute('selectUnlockedCells', ($pSheet->getProtection()->getSelectUnlockedCells() ? 'true' : 'false'));
            $objWriter->endElement();
        }

        /**
         * Write ProtectedRanges
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeProtectedRanges(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            if (count($pSheet->getProtectedCells()) > 0) {
                // protectedRanges
                $objWriter->startElement('protectedRanges');
                // Loop protectedRanges
                foreach ($pSheet->getProtectedCells() as $protectedCell => $passwordHash) {
                    // protectedRange
                    $objWriter->startElement('protectedRange');
                    $objWriter->writeAttribute('name', 'p' . md5($protectedCell));
                    $objWriter->writeAttribute('sqref', $protectedCell);
                    if (!empty($passwordHash)) {
                        $objWriter->writeAttribute('password', $passwordHash);
                    }
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write AutoFilter
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeAutoFilter(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            $autoFilterRange = $pSheet->getAutoFilter()->getRange();
            if (!empty($autoFilterRange)) {
                // autoFilter
                $objWriter->startElement('autoFilter');
                // Strip any worksheet reference from the filter coordinates
                $range = PHPExcel_Cell::splitRange($autoFilterRange);
                $range = $range[0];
                //    Strip any worksheet ref
                if (strpos($range[0], '!') !== false) {
                    list($ws, $range[0]) = explode('!', $range[0]);
                }
                $range = implode(':', $range);
                $objWriter->writeAttribute('ref', str_replace('$', '', $range));
                $columns = $pSheet->getAutoFilter()->getColumns();
                if (count($columns > 0)) {
                    foreach ($columns as $columnID => $column) {
                        $rules = $column->getRules();
                        if (count($rules) > 0) {
                            $objWriter->startElement('filterColumn');
                            $objWriter->writeAttribute('colId', $pSheet->getAutoFilter()->getColumnOffset($columnID));
                            $objWriter->startElement($column->getFilterType());
                            if ($column->getJoin() == PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_COLUMN_JOIN_AND) {
                                $objWriter->writeAttribute('and', 1);
                            }
                            foreach ($rules as $rule) {
                                if (($column->getFilterType() === PHPExcel_Worksheet_AutoFilter_Column::AUTOFILTER_FILTERTYPE_FILTER) && ($rule->getOperator() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL) && ($rule->getValue() === '')) {
                                    //    Filter rule for Blanks
                                    $objWriter->writeAttribute('blank', 1);
                                } elseif ($rule->getRuleType() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_DYNAMICFILTER) {
                                    //    Dynamic Filter Rule
                                    $objWriter->writeAttribute('type', $rule->getGrouping());
                                    $val = $column->getAttribute('val');
                                    if ($val !== null) {
                                        $objWriter->writeAttribute('val', $val);
                                    }
                                    $maxVal = $column->getAttribute('maxVal');
                                    if ($maxVal !== null) {
                                        $objWriter->writeAttribute('maxVal', $maxVal);
                                    }
                                } elseif ($rule->getRuleType() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_TOPTENFILTER) {
                                    //    Top 10 Filter Rule
                                    $objWriter->writeAttribute('val', $rule->getValue());
                                    $objWriter->writeAttribute('percent', (($rule->getOperator() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_TOPTEN_PERCENT) ? '1' : '0'));
                                    $objWriter->writeAttribute('top', (($rule->getGrouping() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_TOPTEN_TOP) ? '1' : '0'));
                                } else {
                                    //    Filter, DateGroupItem or CustomFilter
                                    $objWriter->startElement($rule->getRuleType());
                                    if ($rule->getOperator() !== PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_COLUMN_RULE_EQUAL) {
                                        $objWriter->writeAttribute('operator', $rule->getOperator());
                                    }
                                    if ($rule->getRuleType() === PHPExcel_Worksheet_AutoFilter_Column_Rule::AUTOFILTER_RULETYPE_DATEGROUP) {
                                        // Date Group filters
                                        foreach ($rule->getValue() as $key => $value) {
                                            if ($value > '') {
                                                $objWriter->writeAttribute($key, $value);
                                            }
                                        }
                                        $objWriter->writeAttribute('dateTimeGrouping', $rule->getGrouping());
                                    } else {
                                        $objWriter->writeAttribute('val', $rule->getValue());
                                    }
                                    $objWriter->endElement();
                                }
                            }
                            $objWriter->endElement();
                            $objWriter->endElement();
                        }
                    }
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write MergeCells
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeMergeCells(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            if (count($pSheet->getMergeCells()) > 0) {
                // mergeCells
                $objWriter->startElement('mergeCells');
                // Loop mergeCells
                foreach ($pSheet->getMergeCells() as $mergeCell) {
                    // mergeCell
                    $objWriter->startElement('mergeCell');
                    $objWriter->writeAttribute('ref', $mergeCell);
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write ConditionalFormatting
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeConditionalFormatting(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // Conditional id
            $id = 1;
            // Loop through styles in the current worksheet
            foreach ($pSheet->getConditionalStylesCollection() as $cellCoordinate => $conditionalStyles) {
                foreach ($conditionalStyles as $conditional) {
                    // WHY was this again?
                    // if ($this->getParentWriter()->getStylesConditionalHashTable()->getIndexForHashCode($conditional->getHashCode()) == '') {
                    //    continue;
                    // }
                    if ($conditional->getConditionType() != PHPExcel_Style_Conditional::CONDITION_NONE) {
                        // conditionalFormatting
                        $objWriter->startElement('conditionalFormatting');
                        $objWriter->writeAttribute('sqref', $cellCoordinate);
                        // cfRule
                        $objWriter->startElement('cfRule');
                        $objWriter->writeAttribute('type', $conditional->getConditionType());
                        $objWriter->writeAttribute('dxfId', $this->getParentWriter()->getStylesConditionalHashTable()->getIndexForHashCode($conditional->getHashCode()));
                        $objWriter->writeAttribute('priority', $id++);
                        if (($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CELLIS || $conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT) && $conditional->getOperatorType() != PHPExcel_Style_Conditional::OPERATOR_NONE) {
                            $objWriter->writeAttribute('operator', $conditional->getOperatorType());
                        }
                        if ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT && !is_null($conditional->getText())) {
                            $objWriter->writeAttribute('text', $conditional->getText());
                        }
                        if ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT && $conditional->getOperatorType() == PHPExcel_Style_Conditional::OPERATOR_CONTAINSTEXT && !is_null($conditional->getText())) {
                            $objWriter->writeElement('formula', 'NOT(ISERROR(SEARCH("' . $conditional->getText() . '",' . $cellCoordinate . ')))');
                        } elseif ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT && $conditional->getOperatorType() == PHPExcel_Style_Conditional::OPERATOR_BEGINSWITH && !is_null($conditional->getText())) {
                            $objWriter->writeElement('formula', 'LEFT(' . $cellCoordinate . ',' . strlen($conditional->getText()) . ')="' . $conditional->getText() . '"');
                        } elseif ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT && $conditional->getOperatorType() == PHPExcel_Style_Conditional::OPERATOR_ENDSWITH && !is_null($conditional->getText())) {
                            $objWriter->writeElement('formula', 'RIGHT(' . $cellCoordinate . ',' . strlen($conditional->getText()) . ')="' . $conditional->getText() . '"');
                        } elseif ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT && $conditional->getOperatorType() == PHPExcel_Style_Conditional::OPERATOR_NOTCONTAINS && !is_null($conditional->getText())) {
                            $objWriter->writeElement('formula', 'ISERROR(SEARCH("' . $conditional->getText() . '",' . $cellCoordinate . '))');
                        } elseif ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CELLIS || $conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT || $conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_EXPRESSION) {
                            foreach ($conditional->getConditions() as $formula) {
                                // Formula
                                $objWriter->writeElement('formula', $formula);
                            }
                        }
                        $objWriter->endElement();
                        $objWriter->endElement();
                    }
                }
            }
        }

        /**
         * Write DataValidations
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeDataValidations(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // Datavalidation collection
            $dataValidationCollection = $pSheet->getDataValidationCollection();
            // Write data validations?
            if (!empty($dataValidationCollection)) {
                $objWriter->startElement('dataValidations');
                $objWriter->writeAttribute('count', count($dataValidationCollection));
                foreach ($dataValidationCollection as $coordinate => $dv) {
                    $objWriter->startElement('dataValidation');
                    if ($dv->getType() != '') {
                        $objWriter->writeAttribute('type', $dv->getType());
                    }
                    if ($dv->getErrorStyle() != '') {
                        $objWriter->writeAttribute('errorStyle', $dv->getErrorStyle());
                    }
                    if ($dv->getOperator() != '') {
                        $objWriter->writeAttribute('operator', $dv->getOperator());
                    }
                    $objWriter->writeAttribute('allowBlank', ($dv->getAllowBlank() ? '1' : '0'));
                    $objWriter->writeAttribute('showDropDown', (!$dv->getShowDropDown() ? '1' : '0'));
                    $objWriter->writeAttribute('showInputMessage', ($dv->getShowInputMessage() ? '1' : '0'));
                    $objWriter->writeAttribute('showErrorMessage', ($dv->getShowErrorMessage() ? '1' : '0'));
                    if ($dv->getErrorTitle() !== '') {
                        $objWriter->writeAttribute('errorTitle', $dv->getErrorTitle());
                    }
                    if ($dv->getError() !== '') {
                        $objWriter->writeAttribute('error', $dv->getError());
                    }
                    if ($dv->getPromptTitle() !== '') {
                        $objWriter->writeAttribute('promptTitle', $dv->getPromptTitle());
                    }
                    if ($dv->getPrompt() !== '') {
                        $objWriter->writeAttribute('prompt', $dv->getPrompt());
                    }
                    $objWriter->writeAttribute('sqref', $coordinate);
                    if ($dv->getFormula1() !== '') {
                        $objWriter->writeElement('formula1', $dv->getFormula1());
                    }
                    if ($dv->getFormula2() !== '') {
                        $objWriter->writeElement('formula2', $dv->getFormula2());
                    }
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write Hyperlinks
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeHyperlinks(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // Hyperlink collection
            $hyperlinkCollection = $pSheet->getHyperlinkCollection();
            // Relation ID
            $relationId = 1;
            // Write hyperlinks?
            if (!empty($hyperlinkCollection)) {
                $objWriter->startElement('hyperlinks');
                foreach ($hyperlinkCollection as $coordinate => $hyperlink) {
                    $objWriter->startElement('hyperlink');
                    $objWriter->writeAttribute('ref', $coordinate);
                    if (!$hyperlink->isInternal()) {
                        $objWriter->writeAttribute('r:id', 'rId_hyperlink_' . $relationId);
                        ++$relationId;
                    } else {
                        $objWriter->writeAttribute('location', str_replace('sheet://', '', $hyperlink->getUrl()));
                    }
                    if ($hyperlink->getTooltip() != '') {
                        $objWriter->writeAttribute('tooltip', $hyperlink->getTooltip());
                    }
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write PrintOptions
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writePrintOptions(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // printOptions
            $objWriter->startElement('printOptions');
            $objWriter->writeAttribute('gridLines', ($pSheet->getPrintGridlines() ? 'true' : 'false'));
            $objWriter->writeAttribute('gridLinesSet', 'true');
            if ($pSheet->getPageSetup()->getHorizontalCentered()) {
                $objWriter->writeAttribute('horizontalCentered', 'true');
            }
            if ($pSheet->getPageSetup()->getVerticalCentered()) {
                $objWriter->writeAttribute('verticalCentered', 'true');
            }
            $objWriter->endElement();
        }

        /**
         * Write PageMargins
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writePageMargins(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // pageMargins
            $objWriter->startElement('pageMargins');
            $objWriter->writeAttribute('left', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getLeft()));
            $objWriter->writeAttribute('right', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getRight()));
            $objWriter->writeAttribute('top', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getTop()));
            $objWriter->writeAttribute('bottom', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getBottom()));
            $objWriter->writeAttribute('header', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getHeader()));
            $objWriter->writeAttribute('footer', PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getFooter()));
            $objWriter->endElement();
        }

        /**
         * Write PageSetup
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writePageSetup(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // pageSetup
            $objWriter->startElement('pageSetup');
            $objWriter->writeAttribute('paperSize', $pSheet->getPageSetup()->getPaperSize());
            $objWriter->writeAttribute('orientation', $pSheet->getPageSetup()->getOrientation());
            if (!is_null($pSheet->getPageSetup()->getScale())) {
                $objWriter->writeAttribute('scale', $pSheet->getPageSetup()->getScale());
            }
            if (!is_null($pSheet->getPageSetup()->getFitToHeight())) {
                $objWriter->writeAttribute('fitToHeight', $pSheet->getPageSetup()->getFitToHeight());
            } else {
                $objWriter->writeAttribute('fitToHeight', '0');
            }
            if (!is_null($pSheet->getPageSetup()->getFitToWidth())) {
                $objWriter->writeAttribute('fitToWidth', $pSheet->getPageSetup()->getFitToWidth());
            } else {
                $objWriter->writeAttribute('fitToWidth', '0');
            }
            if (!is_null($pSheet->getPageSetup()->getFirstPageNumber())) {
                $objWriter->writeAttribute('firstPageNumber', $pSheet->getPageSetup()->getFirstPageNumber());
                $objWriter->writeAttribute('useFirstPageNumber', '1');
            }
            $objWriter->endElement();
        }

        /**
         * Write Header / Footer
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeHeaderFooter(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // headerFooter
            $objWriter->startElement('headerFooter');
            $objWriter->writeAttribute('differentOddEven', ($pSheet->getHeaderFooter()->getDifferentOddEven() ? 'true' : 'false'));
            $objWriter->writeAttribute('differentFirst', ($pSheet->getHeaderFooter()->getDifferentFirst() ? 'true' : 'false'));
            $objWriter->writeAttribute('scaleWithDoc', ($pSheet->getHeaderFooter()->getScaleWithDocument() ? 'true' : 'false'));
            $objWriter->writeAttribute('alignWithMargins', ($pSheet->getHeaderFooter()->getAlignWithMargins() ? 'true' : 'false'));
            $objWriter->writeElement('oddHeader', $pSheet->getHeaderFooter()->getOddHeader());
            $objWriter->writeElement('oddFooter', $pSheet->getHeaderFooter()->getOddFooter());
            $objWriter->writeElement('evenHeader', $pSheet->getHeaderFooter()->getEvenHeader());
            $objWriter->writeElement('evenFooter', $pSheet->getHeaderFooter()->getEvenFooter());
            $objWriter->writeElement('firstHeader', $pSheet->getHeaderFooter()->getFirstHeader());
            $objWriter->writeElement('firstFooter', $pSheet->getHeaderFooter()->getFirstFooter());
            $objWriter->endElement();
        }

        /**
         * Write Breaks
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeBreaks(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // Get row and column breaks
            $aRowBreaks    = [];
            $aColumnBreaks = [];
            foreach ($pSheet->getBreaks() as $cell => $breakType) {
                if ($breakType == PHPExcel_Worksheet::BREAK_ROW) {
                    $aRowBreaks[] = $cell;
                } elseif ($breakType == PHPExcel_Worksheet::BREAK_COLUMN) {
                    $aColumnBreaks[] = $cell;
                }
            }
            // rowBreaks
            if (!empty($aRowBreaks)) {
                $objWriter->startElement('rowBreaks');
                $objWriter->writeAttribute('count', count($aRowBreaks));
                $objWriter->writeAttribute('manualBreakCount', count($aRowBreaks));
                foreach ($aRowBreaks as $cell) {
                    $coords = PHPExcel_Cell::coordinateFromString($cell);
                    $objWriter->startElement('brk');
                    $objWriter->writeAttribute('id', $coords[1]);
                    $objWriter->writeAttribute('man', '1');
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
            // Second, write column breaks
            if (!empty($aColumnBreaks)) {
                $objWriter->startElement('colBreaks');
                $objWriter->writeAttribute('count', count($aColumnBreaks));
                $objWriter->writeAttribute('manualBreakCount', count($aColumnBreaks));
                foreach ($aColumnBreaks as $cell) {
                    $coords = PHPExcel_Cell::coordinateFromString($cell);
                    $objWriter->startElement('brk');
                    $objWriter->writeAttribute('id', PHPExcel_Cell::columnIndexFromString($coords[0]) - 1);
                    $objWriter->writeAttribute('man', '1');
                    $objWriter->endElement();
                }
                $objWriter->endElement();
            }
        }

        /**
         * Write Drawings
         * @param    PHPExcel_Shared_XMLWriter $objWriter     XML Writer
         * @param    PHPExcel_Worksheet        $pSheet        Worksheet
         * @param    boolean                   $includeCharts Flag indicating if we should include drawing details for charts
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeDrawings(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null, $includeCharts = false) {
            $chartCount = ($includeCharts) ? $pSheet->getChartCollection()->count() : 0;
            // If sheet contains drawings, add the relationships
            if (($pSheet->getDrawingCollection()->count() > 0) || ($chartCount > 0)) {
                $objWriter->startElement('drawing');
                $objWriter->writeAttribute('r:id', 'rId1');
                $objWriter->endElement();
            }
        }

        /**
         * Write LegacyDrawing
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeLegacyDrawing(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // If sheet contains comments, add the relationships
            if (count($pSheet->getComments()) > 0) {
                $objWriter->startElement('legacyDrawing');
                $objWriter->writeAttribute('r:id', 'rId_comments_vml1');
                $objWriter->endElement();
            }
        }

        /**
         * Write LegacyDrawingHF
         * @param    PHPExcel_Shared_XMLWriter $objWriter XML Writer
         * @param    PHPExcel_Worksheet        $pSheet    Worksheet
         * @throws    PHPExcel_Writer_Exception
         */
        private function writeLegacyDrawingHF(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null) {
            // If sheet contains images, add the relationships
            if (count($pSheet->getHeaderFooter()->getImages()) > 0) {
                $objWriter->startElement('legacyDrawingHF');
                $objWriter->writeAttribute('r:id', 'rId_headerfooter_vml1');
                $objWriter->endElement();
            }
        }
    }
